no joke i was just thinking the 355 has a short stroke so it might have some advantage an yes i know cubic inches rules but i dont use nitrous an have no experience with so you got to ask an i did say making same power

just wondering how a 355 chevy would do vs a 434 both on nitrous making same power

Your question is an oxymoron. It would be VERY different builds to get the same power level out of those two VERY different motors, unless you just use nitrous to get the 355 up to the 434 power level. A 125~150 shot will make more power on a 434 than it will on a 355, cubic inches rule.

stock smogger sbc head will max out about 400 hp no matter what size engine is under them. The difference will be the bigger engine will make the max hp sooner (more torque).

so, I would rather have a 355 with a good set of heads than a 434 with a scrappy stock set.

The next thing to consider is the strength of the block. I would limit the max hp on a stock block to 600hp. so neither build a 500hp 434 with a 100 shot or a 450 hp 355 with a 150 shot. The results will be very similar at the track.

The advantage the 355 would have is the cost to build and slightly lower piston speed at the same rpm.

guess i didnt think about the heads part i would take the 434 just because it would make more overall but i do have a 355 in a book making 900hp on nitrous an thats not to bad for a 355 ---all this said what is the best a 434 can do on nitrous

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